diff options
| -rw-r--r-- | src/result.hpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/result.hpp b/src/result.hpp index e22fde9..4768d9f 100644 --- a/src/result.hpp +++ b/src/result.hpp @@ -6,6 +6,7 @@ #define TMCAGLWM_RESULT_HPP #include <experimental/optional> +#include <functional> namespace wm { @@ -34,6 +35,14 @@ struct result { } char const *unwrap_err() { return this->e; } + + optional<T> ok() const { return this->t; } + optional<char const *> err() const { return optional<char const *>(this->e); } + + template <typename U> + result<U> map(std::function<U(T)> f); + + result<T> map_err(std::function<char const *(char const *)> f); }; template <typename T> @@ -46,6 +55,23 @@ struct result<T> Ok(T t) { return result<T>{nullptr, t}; } +template <typename T> +template <typename U> +result<U> result<T>::map(std::function<U(T)> f) { + if (this->is_ok()) { + return Ok<U>(f(this->unwrap())); + } + return Err<U>(this->e); +} + +template <typename T> +result<T> result<T>::map_err(std::function<char const *(char const *)> f) { + if (this->is_err()) { + return Err<T>(f(this->e)); + } + return *this; +} + } // namespace wm #endif // TMCAGLWM_RESULT_HPP |